Change-speed mechanism.



F. M. CHAPMAN.

CHANGE SPEED MECHANISM.

APPLICATION FILED JUNE 4, 1910.

Patented Aug. 22, 1911.

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INVENTOR nnull WITNEssEs:

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P. M. CHAPMAN. CHANGE SPEED MBGHANISM.

APPLICATION FILED 11111114, 1910.

1,001,354. Patented Aug. 22, 1911.

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INVENTOR.'

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NHIHUIUU Q Hmm ATTORNEYS.

P. M. CHAPMAN.

CHANGE SPEED MEGHANISM.

APPLICATION FILED IUNBI, 1910.

Patented Aug. 22, 1911. 4 BHBETHBHBM a.

INVENTOR WITNESSES: V

ATTORNEYS.

P. M. CHAPMAN.

CHANGE SPEED MEGHANISM.

APPLICATION FILED JUNE 4, 1010.

11,001,354. Patented Aug. 22, 1911.

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ltl SA'FF PATENT FFllCE.

FRANK IVI. CHAPMAN, F HUDSON FALLS, NEW YORK, ASSIGNOR OF ONE-HALF TO ROBERT MeWI-IORTER AND THREE-EIGHTHS TO FRED A. BRATT, BOTH OF FORT EDWARD, NEW YORK.

CHANGE-SPEED MECHANISM.

inerenti.

Specification of Letters Patent.

Patented Aug. 22, 1911.

To all roi/2,0m it 'fno/j concern:

Be it known that I, FRANK M. CHAPMAN, a citizen of the United States, having a resi dence and post-office address at lludson Falls, county of lVashington, State of New York, have invented certain new and useful Improvements 'in Change-Speed Mechanism; and l do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention l as for its object to provide means for driving a shaft from a pulley, or vice versa, and also for varying the speed of transmission and for interrupting the driving when desired.

ln the accompanying drawings, Figure l represents a longitudinal section, partly in side elevation, of a shaft and pulley adapted to be driven the one from the other, as the case may be, in accordance with my invention; Fig. 2 represents a plan view thereof; Fig. 3 represents a vertical transverse sectional elevation, taken on a plane indicated by the line 3-3 of Fig. l; Fig. 4L represents a vertical transverse sectional elevation, taken on' a plane indicated by the line i-vit of Fig. l; Fig. 5 represents a vertical transversensectional elevation, taken on a plane indicated by the line 5-5 of Fig. l; and Fig. G represents a plan view, partly in seetion, of certain of the parts to illustrate their mode of operation.

Similar numerals of reference indicate similar parts throughout the several views.

Although, as hereinbefore stated, the invention is equally applicable to the driving of a pulley from a shaft or the driving of a shaft from a pulley, it may be assumed, for purposes of simplicity of description, that the driving element is the pulley l, and that the driven element is the shaft 2. The pulley is shown as mounted loosely upon the shaft, so as to rotate freely thereon, and is provided internally with a gear track-way 3.

The track-way 3 intel-meshes with gears 4 of a pair of cones 5, which cones are adapted to rotate freely upon shafts G. The shafts G constitute part of a frame, whose other members consist of the end plate t), and the spider 7, whose hub 8 is splined or otherwise fixed to the shaft 2.

Intermediate of the rotatable cones 5 is located the non-rotating cone l0 which is mounted on the shaft Q in inverted position with respect to the rotatable cones. The non-rotating cone 10 is mounted loosely upon the shaft 2 and not only does not talre part in the rotation of the shaft 2, but is shiftable longilrldinally thereon. Normally, the non-rotating cone 'I0 is held in the driving position indicated in Figs. 1 and 2, by means of a spring ll which reacts between an adjustable collar 'l2 and a sleeve 13, which sleeve is attaelwd to and :forms a projection :from the non-rotating cone.

Upon the sleeve 13 is mounted the sliding` collar llt having side straps l5 (see Fig. Q.) which connect it; to an actuating hand lever 16 pivoted to any suitable lined point of support 17 by means of a pin 18 and a. loosemotion slot 19. The hand lever is provided with a spring latch Q0 having a releasing handle 2l, and the spring latch Q0 is adapt; ed to engage behind the flange QQ of a collar 23 fixed upon the shaft 2, so as to retain the hand lever in its extreme outward position of zuljustment, as will be hereinafter more fully set forth.

The collar llf engages a crosseplate, made up in part of the ring 3ft and the spring metal projections Q5. At the outer ends the spring metal projections 25 are fixed the rods QG carrying belt pulleys 97 and passing' through the forked or notched ends 2S of the plate 9. The belt pulleys Q7 snpport an endless belt 20 and this belt passes between the non-rotating cone "l0 and the rotatable cones 5 and engages with their peripheries, as shown.

The parts being constructed and arranged as described, the mode of operation of the invention is as follows: Power derived from the driving pulley l is conununieated to the cones 5 through the iutermediacy of the gear tracloway 3 and the gears 1land maintains the cones 5 in constant rotation upon the shafts (3. This motion of rotation of the cones 5, however, is not transmitted to the shaft 2 unless the non-rotating cone l() is at its inner adjustment, as indicated, for instance, in Figs. l, and Q. lt is held, normally, in this inner adjustment by means of the springl'l,so that the uppe and lower strands of the endless belt QE) are gripped between the non-rotating cone and the rotatable cones 5. The cones 5 will thereupon travel bodily about the cone 110, carrying with them the entire frame of which the spider 7 and its hub 8 form part, and ther'eby driving the shaft 2; it being understood that except for the presence of the endless belt 29, the cones 5 would merely revolve about their shafts 6 without imparting rotary motion to the frame and the shaft 2. The speed with which the shaft 2 is revolved, under these circumstances, will depend upon the position of the belt 29 along the length of the cones, the means provided sutticing to shift the belt so as to place it at any place along the length of the cones from the larg'er ends of the cones 5 to the smaller ends thereof. To this end, when it is desired to speed up the shaft 2, the hand lever 16 will be moved toward the left, whereupon the collar 111 will slide along the sleeve 13 and will carry with it the ring 24;, plates 25 and rods 26, thereby correspondingly moving the belt 29 toward the left and to a position where the ratio of transmission between the cones 5 and the shaft 2 will be increased. Conversely, the farther the belt is moved toward the smaller ends of the cones 5, by shifting the lever 16 toward the right, the less will be the ratio of transmission between the cones 5 and the shaft 2, and the slower will be the speed of the shaft. W'hen it is desired to entirely interrupt the transmission between the pulley and the shaft, the hand lever 16 will be shifted to the right to such an extent that the collar 14 will engage a fixed collar or like projection 31 upon the sleeve 13. Consequently the sleeve 13 and with it the non-rotating cone 10 will be moved toward the right in opposition to the spring 11 and consequently the space between the cone 10 and the rotating cones 5 will be so widened that the endless belt will not be gripped between the opposing surfaces. rlransmission of motion will thereby be entirely interrupted and the cones 5 will cease to revolve about the nonrotating cone 10 and will merely rotate upon their own shafts 6. In order to retain the parts in the non-transmitting adjustment, the spring latch 20 will drop behind the flange 22 on the set collar 23, and, when subsequently released, to reestablish transmission, the spring 11 will return the non-rotating cone 10 to its original position. r1`he collar 12 may be adjusted so as to vary the tension of the spring 11, as may be desired.

t will be understood that, in the particular embodiment of the invention illustrated in the drawings, the nonsrotation of the cone 10 is assured, by reason of the circumstance that the sleeve 13 is splined by the feather 32 to the sliding collar 14, which collar is itself held against rotation by reason of its connection through the hand lever 16 with the point of support of said hand lever.

It will be apparent that as the endless belt 29 is shifted toward the right, it becomes progressively more and more eX- tended by the non-rotating cone, and that therefore someprovision is required in order to meet this contingency. To this end, the belt 29 may be made of correspondingly elastic material, or the necessary take-up and expansion can be obtained by the inward and outward fleXure of the spring metal projections 25. 1n Fig. 6, for instance, the inward fleXure of these spring plates is indicated for the adjustment of the endless belt corresponding to its shift to practically the extreme outer end of the non-rotating cone 10.

Having thus described my invention, what l claim is:

1'. rlhe combination with a shaft and a pulley to be driven the one from the other, of a frame connected to the shaft, cones mounted to rotate on the frame, a driving connection between the pulley and cones, a non-rotating cone intermediate of the rotatable cones, an endless belt passing between and engaging the rotatable cones and the non-rotatingcone, means for shifting the belt so as to engage the cones at various points along their length, and means for shifting the non-rotating cone so as to interrupt the drive when desired; substantially as described.

2. The combination with a shaft and a pulley to be driven the one from the other, of a frame connected to the shaft, cones mounted to rotate on the frame, a driving connection between the pulley and cones, a non-rotating cone intermediate of the rotatable cones, an endless belt passing between and engaging the rotatable cones and the non-rotating cone, and means for shifting the non-rotating cone so as to interrupt the drive when desired; substantially as described.

3. The combination with a shaft and a pulley to be driven the one from the other, of a frame connected to the shaft, cones mounted to rotate on the frame, a driving connection between the pulley and cones, a non-rotating cone intermediate of the rotatable cones, an endless belt passing between and engaging the rotatable cones and the non-rotating cone, means for shifting the non-rotating cone so as to interrupt the drive when desired, and means for retaining the non-rotating cone in its shifted position; substantially as described.

11. The combination with a shaft and a pulley to be driven the one from the other, of a'fraine connected to the shaft, cones mounted to rotate on the frame, a driving connection between the pulley and cones, a non-rotating cone intermediate of the rotatable cones, an endless belt passing between and engaging the rotatable cones and the ,non-rotating cone, means for shifting the non-rotating cone so as to interrupt the drive when desired, and a spring 'for return ing the non-rotating cone to reestablish the drive; substantiallyas described.

5. rlhe combination With a shaft and a pulley to be driven the one from the other, oi a frame connected to the shaft, cones mounted to rotate on the frame, a driving connection between the pulley and cones, a non-rotating cone intermediate of the rotatable cones, an endless belt passing between and engaging the rotatable cones and the nonsrotating cone, and means for shifting the belt so as to engage the cones at various points along their length, said means consisting of a collar, a cross-plate engaged by the collar, rods carried by the cross-plate, bearing rollers for the endless belt mounted on the rods, and an actuating lever eonnected to the collar; substantailly as described.

G. The combination With a shaft and a pulley to be driven the one l'rom the other, of a frame connected to the shaft, cones mounted to rotate on the frame, a driving connection between the pulley and cones, a non-rotating cone intermediate of the rotatable cones, an endless belt passing between and engaging the rotatable cones and the non-rotating cone, and means for shifting the belt so as to engage the cones at various points along their length, said means consisting of a collar, a cross-plate engaged by the collar, rods carried by the cross-plate, bearing rollers for the endless belt mounted on the rods, and an actuating lever con nected to the collar, the cross-plate being of spring metal so as to permit the bearing rollers to recede or approach each other as the belt is shifted; substantially as described.

7. The combination with a shaitt and a pulley to be driven the one 'from the other, of a Yframe connected to the shaft, cones mounted to rotate on the iframe, a driving connection between the pulley and cones, a non-rotating cone intermediate of the rotatable cones, an endless belt passing between and engaging the rotatable cones and the non-rotating cone, a sleeve connected to the non-rotating cone and shiftable longitudinally on the shaft, a spring reacting against the sleeve and normally holding the nonrotating cone in driving engagement, a collar mounted on the sleeve, a cross-plate engagecl by the collar, rods carried by the cross-plate, bearing rollers Yfor the endless belt mounted on the rods, and an actuating lever connected to the collar; substantially as described.

In testimony whereof I afllix my signature, in presence of two witnesses.

FRANK M. CHAPMAN.

Witnesses:

Ronnn'r MelVHon'ran, JOHN C. PnNNin.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

